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Efficacy of reactive mineral-based sorbents for phosphate, bacteria, nitrogen and TOC removal: Column experiment in recirculation batch mode
Department of Land and Water Resources Engineering, Royal Institute of Technology, Stockholm, Sweden.ORCID iD: 0000-0003-2962-6587
School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden.
Department of Land and Water Resources Engineering, Royal Institute of Technology, Stockholm, Sweden.
School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden.
2013 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 47, no 14, p. 5165-5175Article in journal (Refereed) Published
Abstract [en]

Two mineral-based materials (Polonite and Sorbulite) intended for filter wells in on-site wastewater treatment were compared in terms of removal of phosphate (PO4-P), total inorganic nitrogen (TIN), total organic carbon (TOC) and faecal indicator bacteria (Escherichia coli and Enterococci). Using an innovative, recirculating system, septic tank effluent was pumped at a hydraulic loading rate of 3000 L m(2) d(-1) into triplicate bench-scale columns of each material over a 90-day period. The results showed that Polonite performed better with respect to removal of PO4-P, retaining on average 80% compared with 75% in Sorbulite. This difference was attributed to higher CaO content in Polonite and its faster dissolution. Polonite also performed better in terms of removal of bacteria because of its higher pH value. The total average reduction in E. coli was 60% in Polonite and 45% in Sorbulite, while for Enterococci the corresponding value was 56% in Polonite and 34% in Sorbulite. Sorbulite removed TIN more effectively, with a removal rate of 23%, while Polonite removed 11% of TIN, as well as TOC. Organic matter (measured as TOC) was accumulated in the filter materials but was also released periodically. The results showed that Sorbulite could meet the demand in removing phosphate and nitrogen with reduced microbial release from the wastewater treatment process. (C) 2013 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Oxford, United Kingdom: Elsevier, 2013. Vol. 47, no 14, p. 5165-5175
Keywords [en]
Polonite, Sorbulite, Enterococci, Escherichia coli
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:oru:diva-41672DOI: 10.1016/j.watres.2013.05.056ISI: 000324566400034PubMedID: 23866147Scopus ID: 2-s2.0-84883285298OAI: oai:DiVA.org:oru-41672DiVA, id: diva2:780885
Available from: 2015-01-15 Created: 2015-01-15 Last updated: 2018-05-23Bibliographically approved

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